<template>
    <div>
        <div class="search">
            <input type="text" v-model="keyword" class="search-input" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            <ul>
                <li 
                    class="search-item border-bottom" 
                    v-for="item of list" 
                    :key="item.id"
                    @click="handleClick(item.name)"
                >
                    {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">
                    没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
    
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'

export default {
    name:'CitySearch',
    props:{
        cities:Object
    },
    data () {
        return {
            keyword:'',
            list:[],
            timer:null
        }
    },
    computed:{
        hasNoData () {
            return !this.list.length
        }
    },
    mounted () {
        this.scroll=new Bscroll(this.$refs.search)
    },
    methods:{
        handleClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    watch:{
        keyword () {
            if(this.timer) {
                clearTimeout(this.timer)
            }
            if(!this.keyword) {
                this.list = []
                return
            }
            this.timer=setTimeout(() => {
                const result=[]
                for (let i in this.cities) {
                    this.cities[i].forEach(value => {
                        if(value.spell.indexOf(this.keyword)>-1 || value.name.indexOf(this.keyword)>-1) {
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    }
}
</script>

<style lang="stylus" scoped>
    @import '~style/varibles.styl'

    .search
        height .72rem
        padding 0 .1rem
        background $bgColor
        .search-input
            box-sizing border-box
            width 100%
            padding 0 .1rem
            height .62rem
            line-height .62rem
            text-align center
            border-radius .06rem
            color #666
    .search-content
        z-index 1
        overflow hidden
        position absolute
        top 1.58rem
        left 0
        right 0
        bottom 0
        background #eee
        .search-item
            line-height .62rem
            padding-left .2rem
            background #fff
            color #666
</style>
